FLV (Speex) to MP4

Format : Flash Video
File size : 67.9 MiB
Duration : 20mn 35s
Overall bit rate : 461 Kbps

Video
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L3.0
Format settings, CABAC : No
Format settings, ReFrames : 1 frame
Codec ID : 7
Duration : 20mn 35s
Bit rate mode : Constant
Nominal bit rate : 1 024 Kbps
Width : 640 pixels
Height : 480 pixels
Display aspect ratio : 4:3
Frame rate mode : Variable
Frame rate : 30.000 fps
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.111

Audio
Format : Speex
Codec ID : 11
Duration : 20mn 35s
Channel(s) : 1 channel
Sampling rate : 5 500 Hz
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : -8s 804ms

anyone can help me please ? :(